Cutter guard for mowing machines



Oct. 18, 1927.

S. E. LYLE CUTTER GUARD FOR MOWING MACHINES Filed Nov. 6, 1925 2Shgets-Sheet 1 .ZIZ/ZLO, v QM Oct. 18,1927. ,6 6

' S E. LYLE CUTTER GUARD FOR MOWING MACHINES Filed Nov. 6,. .1925 2Shets-Sheet 2 PATENT- o Fics.

i SAMUEL E. LYLE, OF MONTGOLIERY, ALABAI/IA.

CUTTER GUARD non MOWING MACHINES.

Application filed November This invention relates to an improved cutterguard for use upon mowing machines.

What I propose is an improved guard, the body portion of which is quitesimilar to that now employed. but is constructed to accoinmodate ahingedly mounted retainer for a readily removab e cutter plate.

More specifically, the guard is formed with a recess above which it isbifurcated, the furcation accommodating a, winglike part on a hingedlymounted retainer, and said retainer embodying a plate disposed over theremovable cutter plate.

A. feature of construction is a novel key and slot connection betweenthe wing of the hinged part and the outer end edge of the removablecutter plate.

Other features and advantages of the invention 'will become apparentfrom the following description and drawings.

In the accompanying drawings forming a part of this application, and inwhich like numerals are employed to designate like parts throughout thesame:

Figure 1 is a side elevation of a cutter guard constructed in accordancewith the present invention showing the complete assembly.

Figure 2 is a longitudinal section through the same.

Figure 3 is a horizontal section taken approximately 011 the plane ofthe line 3-3 of Figure 1.

Figure 4 is a cross section taken approximately upon the plane of theline 4-t of Figure 1.

Figure 5 is a top plan view of the cutter plate removed.

Figure 6 is a perspective view of the casting forming the body of theguard.

Figure 7 is a bottom plan view of the cutter plate retainer detached.

Figure 8 is a side elevation of this retainer.

Figure 10 is an end View of the same.

Figure 9 is a cross section taken approximately upon the plane of theline 9-9 of Figure 1.

Referring first to Figure 6 it will be seen that the reference character1 designates a single metal casting in the form of a forwardly taperedand pointed body 2. The outer end portion of. this body is increased inheight as shown, and is bifurcated as indicated at 3 to provide spacedfurcations l. Beneath these furcations it is formed with a 6, 1925.Serial No. 67,469.

longitudinal recess 5., Beyond the furca-' tions and recess it is flatand reduced in height and increased in width as shown at 6. Thisflattened portion terminates on a plane with a pair of outstandingspacing lugs 7,

the inner opposed ends of these being beveled to receive thecorrespondingly shaped edges of the removable cutter plate 8. This plateis fiat in design and tapered outwardly as shown in top plan in Figure3, and the longitudinal edges are shaped to provide cutting edges to actin the usual manner. On its underside, this plate is formed with aT-shaped head 9 which is slidably received in the corres ondingly shapedrecess 10 in the aforesaid casting. At this time I would directattention to Figure 5 wherein it will be seen that the plate is providedin its upper face with a niche 11 to receive a suitable instrument to beutilized in driving the plates out to remove it. Also, the opposite endof the plate is formed with a key hole slot 12 which acts in the mannerto be hereinafter described.

The aforesaid retainer is generally indicated by the referencecharacters 13 (see Figures 7 to 10 inclusive). The retainer comprises ahorizontal plate like portion 14 having a right angular wing-likeextension 15 provided with pin holes 16 and 17. At the point ofconnection with the wing, it is formed with outstanding portions 18providing shoulders to rest on top of the cutter plate 8. Moreover,beneath these shoulders it is formed with rounded ribs 19 functioning askeys for reception in the correspondingly shaped portion of theaforesaid slot 12 (see Figure As before intimated, the parts 15 isreceived between the furcations 4 and the lower portion is seated in theaforesaid recess 5. l/Vhen the removable cutter plate is in position onthe fiat face 6 in Figure 6, the shoulders 18 com-e down on top of theplate 'asshown, Figure 9, and at the same time the keys 19 are receivedin the slot 12, whereby to hold the cutter plate firmly in place but toallow it to be readily removed. A pivot pin 20 passes through thefurcations 4 and the pivot hole 16 (see Figure 8) and a retaining pin 21(see Figures 1 and 2) passes through the body portion 2 and the hole 17.In this way the retainer is held in the operative position shown in thelast named Figures and in turn maintains the cutter blade in position.The pin 21 may be removed however, and the retainer swung up to thedotted line position shown in Figure 1 to permit the plate to beremoved.

It is believed that by considering the description in connection withthe drawings, persons familiar with devices of this class will be ableto obtain a clear understand ing of the invention. Therefore, a morelengthy description is thought unnecessary.

Minor changes coming within the field of invention claimed may beresorted to if de-- sired.

Having thus described the invention, what I claim as new is 1. In astructure of the class described,

said shoulders being adapted to bear upon the top of said plate, andaretaining pin passing through said body and wing.

2. In a device of the class described, a cutter guard comprising a-bodyportion provided at its forward ends with the usual tender, and a flatcutter plate receiving surface directly rearwardly ot' the fender, aremovable cutter plate, lugs arranged 011 the flat surface of the bodyat the rear end portion thereof and between which the cutter plate isslidable, the rear end of the body portion being provided with aninverted T-shaped recess, an inverted T-shaped lug carried by the bottomof the rear portion of the cutter plate and adapted to be disposedwithin the aforementioned recess for locking the rear portion of theplate on the adjacent portion of the body, and additional locking meanspivotally associated with said fender and cooperating with the forwardportion of the cutter plate.

In testimony whereof I aflix my signature.

SAMUEL E. LYLE.

